Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair Value - Reconciliations of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Corporate and Other Bonds
Reconciliations for All Assets and Liabilities [Roll Forward]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset value	$ 846	$ 883	$ 846	$ 883	$ 915	$ 937	$ 767	$ 770
Included in Net Income	(1)	3	(2)	(10)
Included in OCI	(82)	16	(153)	(24)
Purchases	51	122	118	164
Sales		(3)	(5)	(3)
Settlements	(37)	(22)	(59)	(24)
Transfers into Level 3			10	10
Transfers out of Level 3
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at June 30
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at June 30	(81)	16	(153)	(24)
States, municipalities and political subdivisions
Reconciliations for All Assets and Liabilities [Roll Forward]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset value	46	57	46	57	51	56	44	46
Included in Net Income
Included in OCI	(5)	2	(10)
Purchases		12		12
Sales
Settlements		(1)		(1)
Transfers into Level 3
Transfers out of Level 3
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at June 30
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at June 30	(5)	2	(10)
Total asset-backed
Reconciliations for All Assets and Liabilities [Roll Forward]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset value	641	410	641	410	604	556	315	308
Included in Net Income	8	1	11	3
Included in OCI	(52)	4	(84)	(5)
Purchases	92	84	232	114
Sales	(2)		(2)
Settlements	(23)	(10)	(40)	(27)
Transfers into Level 3	14	21	19	30
Transfers out of Level 3		(5)	(51)	(13)
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at June 30
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at June 30	(52)	4	(83)	(5)
Fixed maturities available-for-sale
Reconciliations for All Assets and Liabilities [Roll Forward]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset value	1,533	1,350	1,533	1,350	1,570	1,549	1,126	1,124
Included in Net Income	7	4	9	(7)
Included in OCI	(139)	22	(247)	(29)
Purchases	143	218	350	290
Sales	(2)	(3)	(7)	(3)
Settlements	(60)	(33)	(99)	(52)
Transfers into Level 3	14	21	29	40
Transfers out of Level 3	0	(5)	(51)	(13)
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at June 30	0	0	0	0
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at June 30	(138)	22	(246)	(29)
Fixed maturities trading
Reconciliations for All Assets and Liabilities [Roll Forward]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset value	0	0	0	0	0	0	5	8
Included in Net Income		(3)		(6)
Included in OCI
Purchases
Sales
Settlements		(2)		(2)
Transfers into Level 3
Transfers out of Level 3
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at June 30
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at June 30
Fixed maturity securities
Reconciliations for All Assets and Liabilities [Roll Forward]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset value	1,533	1,350	1,533	1,350	1,570	1,549	1,131	1,132
Included in Net Income	7	1	9	(13)
Included in OCI	(139)	22	(247)	(29)
Purchases	143	218	350	290
Sales	(2)	(3)	(7)	(3)
Settlements	(60)	(35)	(99)	(54)
Transfers into Level 3	14	21	29	40
Transfers out of Level 3	0	(5)	(51)	(13)
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at June 30	0	0	0	0
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at June 30	(138)	22	(246)	(29)
Equity securities
Reconciliations for All Assets and Liabilities [Roll Forward]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, asset value	47	36	47	36	$ 44	$ 29	$ 45	$ 43
Included in Net Income	(3)	(15)		(13)
Included in OCI
Purchases		10	12	10
Sales	(3)	(4)	(3)	(4)
Settlements	9		9
Transfers into Level 3
Transfers out of Level 3
Unrealized Gains (Losses) Recognized in Net Income (Loss) on Level 3 Assets and Liabilities Held at June 30	(3)		(1)	2
Unrealized Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Level 3 Assets and Liabilities Held at June 30